Electrochemical Reaction of Ammonia Formation using Tungsten-Iron Catalyst with Proton-Conducting Solid Oxide Fuel Cell

摘要

In last decade, renewable energy has been fast-growing in the world, but their unstable properties also become a big issue. One of the solutions is storage of excess renewable energy via electrosynthsis of ammonia which has high hydrogen density and chemical stability. Also, the process of ammonia electrosynthesis is carbon-free and more friendly to environment than Haber process. Recently, we reported electrochemical promotion of ammonia formation using Al-K-Fe-BaCeY0.1O3 [1], which indicated that ammonia formation could be improved by cathodic polarization. However, the faradic efficiency was very low, about 0.2%, and the working temperature was high about 700?C, which is thermodynamically unfavorable for ammonia formation. In this study, the effect of W addition into Fe on enhancing faradic efficiency and lowering temperature was investigated.